2K9C:
reference: Paramagnetic shifts in solid-state NMR of proteins to elicit structural information., Balayssac S, Bertini I, Bhaumik A, Lelli M, Luchinat C, Proc Natl Acad Sci U S A. 2008 Nov 11;105(45):17284-9. Epub 2008 Nov 6. PMID: 18988744

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